Shaanxinus baitianhe Irfan, Rehman, Wang & Zhang, 2026, sp. nov.

Shaanxinus baitianhe sp. nov. Figs 1 A – D, 10 A, 10 B, 11 Chinese name. 白天河陕蛛. Type material. Holotype: ♂, China: • Shaanxi Province, Hanzhong City, Zhenba County, Qingshui Town, Renhe Village, Baitianhe Nature Reserve, 32°46.639'N, 107°42.942'E, alt. 1048 m, 2013-5-26, Liu Mingxin, Meng Xiangwei leg. (SWUC -T-LIN-40-01). Etymology. The specific epithet is derived from the type locality. Diagnosis. Male of Shaanxinus baitianhe sp. nov. resembles S. rufus Tanasevitch, 2006 in having a similar paracymbium (Fig. 1 B; Lin et al. 2019: fig. 7 b), but it can be distinguished by the anterior radical process apex with one long projection and two small teeth (Fig. 1 A), which are absent in S. rufus (Tanasevitch 2006: fig. 51). Description. Male (holotype, Fig. 10 A, B): total length: 3.45. Carapace 1.63 long, 1.19 wide, yellow, cephalic lobe 0.81 high; sulci present below anterior eye row; fovea, cervical and radial grooves distinct. Clypeus 0.37 high, with many microsetae. Chelicerae with 5 promarginal and 4 retromarginal teeth. AER strongly recurved, PER procurved, slightly wider than AER. Eye sizes and interdistances: AME 0.05, ALE 0.06, PME 0.06, PLE 0.07, AME – AME 0.06, PME – PME 0.12, AME – PME 0.15, AME – ALE 0.12, PME – PLE 0.12, ALE – ALE 0.46, PLE – PLE 0.54, ALE – PLE 0.02. Length of legs: I 5.25 (1.63, 1.82, 1.20, 0.60), II 5.86 (1.95, 1.99, 1.31, 0.61), III 4.09 (1.25, 1.31, 1.06, 0.47), IV lost. Leg II longer than I. TmI 0.32. Tibial spine formula: 2–2 – 2 – 0. Abdomen 1.87 long, 1.18 wide, oval, pale, greenish-black pattern, ventral side pale. Pedipalp (holotype, Fig. 1 A – D). Patella as long as tibia, ventrally grooved. Tibia with 2 retrolateral and 1 dorsal trichobothria, posterior margin with long, thick spines. Paracymbium C-shaped, distal arm tip margin wave-like in retrolateral view. Tegulum extending retrolaterally, with well-developed membranous protegulum. Distal suprategular apophysis disc-shaped, tapering towards tip. Radix with large anterior radical scaly part with 2 small teeth; anterior radical process distal end sharp projection with pointed tip in prolateral view; lateral extension of radix slightly curved, apex blunt in retrolateral view, covering terminal part of embolus; tailpiece triangular with pointed end; median membrane present; embolus sclerotised, arc-shaped. Female. Unknown. Distribution. Known only from the type locality (Fig. 11).